Solar catamaran "sun21"

The "sun21"

The boat is called "sun21". It is a catamaran of the MW-LINE Type C 60 and it is similar to the boats used at the Swiss National Exposition Expo 02. The boat is about 14 m long and 6.6 m wide. It sleeps 5 to 6 persons for the long journey across the Atlantic and has room for large groups for visits or short excursions. The kitchen is placed in one hull and sanitary installations in the other. A large deck roofed with photovoltaic modules has been installed between the hulls. The boat is equipped with solar modules, batteries and motors allowing a constant speed of 56 knots (1012 km/h) 24 hours a day, equivalent to the average speed of sailing yachts.

Sketch of the solar catamaran "sun21" by MW Line SA

Technical data


Aquabus C60


6 bunks, room for several dozen passengers for short visits or excursions


14 meters


6.6 meters


maximum 1 meter with full load


ca. 12 tons


2 electric motors, 8 kW each


520 Ah/C5, 48 V DC lead accumulators in each hull


2 x 5 kW solar modules, ca. 65 m2


maximum 7 knots (ca 13 km/h) long-range speed ca. 5 knots (ca 9 km/h)